Title:
DISTORTION CALIBRATOR
Document Type and Number:
Japanese Patent JP3411254
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a distortion calibrator, which enables accurate generation of a bridge output with a level corresponding to a set distortion value over a wide range of distortion along and to have a simple structure.
SOLUTION: This apparatus includes a ladder resistance circuit 14 for applying a bridge power source voltage Vin, output switching circuits 15a-15e for selectively outputting the voltages of a plurality of voltage output parts P0-P10 of the ladder resistance circuit 14, an addition processing circuit 16 for adding outputs of output resistance circuits 15a-15e which are weighted with mutually different factors and attenuation circuits 12a-12c, in which the output of the addition processing circuit 16 is reduced in voltage with positive and negative polarities, to generate a bridge output Vout with the level thereof corresponding to a distortion value. The outputs of the output switching circuits 15a-15e are controlled by a microcomputer 13 according to the set distortion value.
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Inventors:
Takuro Ozawa
Yoshihiro Takahashi
Yoshihiro Takahashi
Application Number:
JP2000135721A
Publication Date:
May 26, 2003
Filing Date:
May 09, 2000
Export Citation:
Assignee:
Tokyo Sokki Research Institute Co., Ltd.
International Classes:
G01L1/00; G01B7/16; G01L25/00; (IPC1-7): G01B7/16; G01L1/00; G01L25/00
Domestic Patent References:
| JP11108774A | ||||
| JP603558A | ||||
| JP6355403A | ||||
| JP57161604A | ||||
| JP3190324A | ||||
| JP63131024A | ||||
| JP5067159A | ||||
| JP62133108U | ||||
| JP55119948U |
Attorney, Agent or Firm:
Tatsuhiko Sato (1 outside)
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